<template>
    <el-container class="home-container">
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <el-aside :width="isCollapse?'64px':'200px'" >
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#ffd04b"
                    unique-opened
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    router
                    :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <el-menu-item @click="saveNavState(subItem.path)" :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
                            <i class="el-icon-location"></i>
                            {{subItem.authName}}
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-main >
              <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>

</template>
<script>
export default {
  created(){
    this.getMenulist()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  data () {
    return {
      menulist:[],//左侧菜单数据
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isCollapse:false,
      activePath:''
    };
  },
    methods:{
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        async getMenulist(){
          const {data:res} = await this.$http.get('menus')
          if(res.meta.status != 200)return this.$message.error(res.meta.msg)
          this.menulist = res.data
        },
        toggleCollapse(){
          this.isCollapse = !this.isCollapse
        },
        //保持链接的激活状态
        saveNavState(activePath){
          this.activePath = '/' + activePath
          sessionStorage.setItem('activePath','/'+activePath)
        }
    }
}
</script>
<style lang='less' scoped>
 .home-container{
  height:100%;
}
.el-header{
  background-color:#373d41;
}
.el-aside{
  background-color:#333744;
}
.el-main{
  background-color:#eaedf1;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
  >div{
    display: flex;
    align-items: center;
    span{
      margin-left:15px;
    }
  }
}    
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    cursor: pointer;
  }
</style>